To simplify software development
We define Open Source
The Open Source Definition is the foundation of the modern software ecosystem. We build a world where the freedoms and opportunities of Open Source software can be enjoyed by all.
The leading voice on the policies and principles of open source
Protecting the Open Source ecosystem
We support institutions and individuals working together to create communities of practice in which the healthy open source ecosystem thrives.
Preliminary agenda announced for the Open Technology Research Symposium 2026
Open Technology Research Symposium 2026 releases preliminary agenda. The event takes place on 26 and 27 October 2026 at the University of Barcelona during Barcelona Open Tech Week
Openness Made All of This Possible
Every AI system in the headlines today, whether proprietary or Open Source, exists because researchers shared their work openly. That openly shared research produced Open Source software: the frameworks used to train these models, the libraries …
UN Open Source Week, AI Fellowship, and 2025 Annual Report
Members Newsletter – July 2026: Two weeks ago, I was joined by several staff and board members at UN Open Source Week. It’s remarkable to think about how this event has evolved to become one of …
Open Source AI Fellowship Announced at UN Open Source Week
The OSI is pleased to announce the launch of the Open Source AI Fellowship at UN Open Source Week.
Support Open Source
As a public charity organization, OSI is supported by donations of corporations and individuals. Thanks to our sponsors that support our vision to be the leading voice on policies and principles of Open Source.
The board of directors
Most of OSI’s board of directors are elected by individual members and Affiliate organizations.